JP2001355184A - Method for producing antimicrobial coccoon filament - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the utilization not only to clothes but also to wadding for beddings, subsistence goods, etc., requiring antimicrobial properties by providing cocoon filaments with the antimicrobial properties. SOLUTION: An aqueous solution of chitosan is directly applied to cooked cocoons.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cocoon thread having antibacterial properties, thereby expanding its use not only for clothing, but also for batting for bedding and household goods requiring antibacterial properties.

[0002]

2. Description of the Related Art Silk has good heat retention, moisture absorption and desorption properties, and is excellent in health and hygiene functions, but its use is actually limited. In recent years, the development of new silk materials has been attempted to expand into the Western clothing field, but further expansion into new fields is required.For example, with the advent of an aging society, as clothing or bedding for nursing care and medical care, The demand for clothing with high antibacterial properties is increasing.

[0003] As a method of imparting antibacterial properties to silk, conventionally, an antibacterial agent has been applied to silk cloth, but this method does not allow the antibacterial agent to penetrate into the inside of the silk cloth yarn.
There is a drawback that the antibacterial property cannot be sufficiently obtained. Therefore, there is a need for the development of an efficient method for imparting sufficient antibacterial properties to silk.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to develop a method for effectively providing a cocoon thread with antibacterial properties.

[0005]

Means for Solving the Problems The present inventors have made intensive efforts to solve the above-mentioned problems, and as a result, have found that the solution can be achieved by directly attaching an aqueous solution of chitosan to a boiled cocoon. That is, the present invention provides (1) a method for producing an antibacterial cocoon thread, which comprises introducing a boiled cocoon into an aqueous chitosan solution and adhering the chitosan aqueous solution around the cocoon thread when the cocoon thread dissociates; The method for producing an antibacterial cocoon thread according to (1), wherein the chitosan aqueous solution is applied by a covering roller when the cocoon thread is wound, and (3) the method comprising drying after attaching chitosan. (1) The method for producing an antibacterial cocoon according to (2), (4) the antibacterial cocoon according to any one of (1), (2) or (3), wherein a wood vinegar solution is attached. It relates to a manufacturing method.

At present, most of raw silk is made by automatic reeling machines in Japan. The automatic reeling machine keeps the boiled cocoon (Nimayu) sent from the boiled cocoon machine, and sends it back from the new cocoon replenishing tank, new cocoon and the unraveling section, which sends the required amount of cocoon to the cordage. Search for clues from the cocoons that have arrived, and use them as cordage and paper cording devices to quickly find the right clues. It is composed of a standby unit, a cocoon replenishing device, a reeling unit for reeling raw silk, and a cocoon feeder that constantly circulates around the unit and replenishes the cocoon with a finer cord.

[0007] A feature of the present invention is that it has been found that at the time of reeling is most suitable for making the antibacterial property of chitosan adhere to cocoon thread. Usually, when fabrics are processed, the fabrics themselves are subjected to chemical treatment or dye treatment. In particular, in the case of silk, in order to maintain the characteristics of silk, the fabric is processed as little as possible except for dyeing. Was.

On the other hand, in the aging society in recent years, medical and welfare related industries have demanded antibacterial fabrics.
Attempts have also been made to apply antibacterial treatment to silk fabrics. However, in the case of silk, even if an antibacterial treatment is applied to the cloth, there is a disadvantage that the cloth does not sufficiently penetrate into the inside.

The present inventor developed a silk wave (bulky unconjugated long-fiber cocoon bundle) in 1996, in which a futon or a batting of the garment is kept in a long fiber state without cutting the cocoon.
Research has been conducted to make silk have the antibacterial property of chitosan using this silk wave, and it has been found that it is best to attach the antibacterial property of chitosan at the time of reeling.

[0010] The present invention also relates to a method comprising:
It has also been found that the cocoon or raw silk can be kept coated with chitosan by drying. In addition, as an addition amount of chitosan, 0.1 to 0.5
% Is preferable. If the amount of chitosan is too large, the finished product has a rough touch, which is not preferable. 0.1
% Or less, the antibacterial property is inferior and the effect does not come out.

Furthermore, it has been found that by attaching a wood vinegar solution, not only antibacterial properties but also functions such as insect repellency and fungicide can be imparted. On the other hand, the time when chitosan is adhered to the reeled yarn is preferably when the cocoon thread is dissociated, but there is also a method in which chitosan is adhered in the middle of the yarn path by a covering roller.

According to the present invention, an antibacterial effect can be imparted to silk products, and the antibacterial effect is not lost even by dry cleaning treatment.
Not only is it useful in the nursing and medical fields, it can also be used as shoe backing. Hereinafter, the present invention will be described more specifically with reference to examples.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Example] A cooked cocoon was put into an aqueous solution of chitosan, and when the cocoon thread was dissociated, the aqueous solution of chitosan was attached around the cocoon thread. The chitosan aqueous solution is prepared by suspending 10 g and 50 g of powdered chitosan in 1 liter of ion-exchanged water, adding 100 ml of 0.5N hydrochloric acid, and adding 30 ml at room temperature.
What was stirred and dissolved for minutes was used.

Staphylococcus aureus IFO
After inoculating 12732, the cells were cultured at 37 ± 1 ° C. for 18 hours, and the number of recovered bacteria was measured. In particular, changes in antibacterial properties due to dry cleaning were also examined, and the results are summarized in Table 1.

[0015]

[Table 1]

According to the results shown in Table 1, chitosan 0.1.
By adhering 1% or 0.5%, even before the dry cleaning process or after the dry cleaning process,
The number of inoculated bacteria increases without treatment, but the amount of chitosan is increased to 0.1.
It can be seen that a significant reduction is achieved by depositing 1% or 0.5%.

[0017]

According to the present invention, chitosan can be adhered at the time of reeling, so that it is not necessary to process the finished cocoon thread or raw thread, and the silk product can have antibacterial properties effectively. Then, the antibacterial property can be used in the nursing care and medical fields.

[Brief description of the drawings]

FIG. 1 is a view showing that a chitosan aqueous solution is put into a reeling tank, a boiled cocoon is put into the chitosan aqueous solution, the cocoon is dissociated, and chitosan is adhered around the cocoon and reeled.

FIG. 2 is a view showing that a chitosan aqueous solution is wound around a cocoon thread by a covering roller during the course of the thread winding.

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Claims (4)

[Claims] 1. A method for producing an antibacterial cocoon thread, comprising introducing a boiled cocoon into an aqueous chitosan solution and attaching the chitosan aqueous solution around the cocoon thread when the cocoon thread dissociates. 2. A method for producing an antibacterial cocoon thread, wherein a chitosan aqueous solution is adhered by a covering roller when the cocoon thread is reeled. 3. The method for producing an antibacterial cocoon thread according to claim 1, wherein the chitosan is adhered and then dried. 4. The method for producing an antibacterial cocoon thread according to claim 1, wherein a wood vinegar solution is adhered.